1. Aluminum alloy body design, sturdy and durable. 24V/5A power supply, 2. Equipped with TI TPA3116*2 Class D digital amplifier chips, the maximum power can reach 100+100W 3. Built-in DSP chip, supports high and low sound effect adjustment. 4. Supports three signal inputs: active, coaxial, and optical fiber, and the front panel button switches with one button. 5. Supports 6.5mm microphone insertion for singing. Front circular RGB multi-color fantasy lights, cool status. Equipped with infrared remote control, supports various function operations. Standard outer diameter 5.0mm/inner diameter 2.5mm power interface, supports DC 12V-24V power input. Transmission distance:barrier-free about 10-20 meters signal Input interface:RCA/Coaxial/Optical/6.5MM MIC Output interface:AUX/binding post Input parameters:DC 12-24V Supported protocols:A2DP/AVRCP/HFP/SBC Basic functions:Bluetooth reception, Bluetooth transmission, U disk playback (maximum support 128G, without card), RGB fantasy color display, microphone singing. Applicable equipment:various speakers, desktops, notebooks, TVs, amplifiers, projectors, etc. Power Supply:2xAAA batteries(Not included batteries) Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC220V Colour:Black Material:Aluminum Alloy Package Contents: 1 * desktop power supply 1 * Bluetooth amplifier 1 * 3.5mm audio cable 1 * red and white RCA cable 1 * Bluetooth antenna 1 * infrared remote control Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.